Genesis of the columnar joints from welded tuff in Mount Mudeung National Geopark, Republic of Korea

Earth, Planets and Space

Table 3 Data of face widths

Column number	Face 1	Face 2	Face 3	Face 4	Face 5	Face 6	Face 7
Jiwang-bong (unit: cm)
1	210
2	280	100	170
3	170	120	90	310	200
4	180	120	170
Mean face width	177
Seoseok-dae (unit: cm)
1	120	120	130	150	100
2	160	110	170	130	110
3	170	110	130
4	120	100
Mean face width	129
Ipseok-dae (unit: cm)
1	100	150	135	128
2	220			220
3	170			170
4	160	90		125
5	150	90		120
6	160	120		140
7	116	165		140
8	175			175
9	100	70	100	90
10	140	120	130	130
11	160	100	100	120
12	110			110
13	150	140		145
Mean face width	134
Gwangseok-dae (unit: cm)
1	180	180	350	360	400	280
2	230	160	300	280	210	210	290
3	300	130	240	200
4	280	260	270	340
5	250	210	300	400	400	200
6	310	260	300
7	910	135	310
8	350	135	310	135
9	360	350	170	200	280	550
Mean face width	285
Sinseon-dae (unit: cm)
1	125	90	100	90	90		99
2	110	100	140	135	90		115
3	100	80	70	110	115	90	95
4	140	250	90	70	90	70	118
5	120	190	115	160	140		145
6	110	140	130	170			137.5
7	170	130	150	150			150
Mean face width	121